<template>
	<view>
    
    <!-- 使用自定义的搜索组件 -->
    <!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
    <my-search @click="gotoSearch"></my-search>
    
		<view class="scroll-view-container" >
      
      <!-- 左侧的滑动区域 -->
      <scroll-view  class="left-scroll-view" scroll-y="true" :style="{height:wh + 'px' }">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i === active ? 'active' : '']"
          @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>
      </scroll-view>
      
    <!-- 右侧的滑动区域 -->
         <scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
           <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
             <!-- 二级分类的标题 -->
             <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
             <!-- 当前二级分类下的三级分类列表 -->
             <view class="cate-lv3-list">
               <!-- 三级分类的Item项 -->
               <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
                 <!-- 三级分类的图片 -->
                 <image :src="item3.cat_icon.replace('ugo-dev','hmugo-web')" ></image>
                 <!-- 三级分类的文本 -->
                 <text>{{item3.cat_name}}</text>
               </view>
             </view>
           </view>
         </scroll-view>
      
    </view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//当前设备可用的高度
        wh: 0,
        cateList: [],
        active: 0,
        //二级分类的列表
        cateLevel2: [],
        scrollTop: 0
			};
		},
    onLoad(){
      const sysInfo = uni.getSystemInfoSync()
      // console.log(sysInfo)
      this.wh = sysInfo.windowHeight -50
      
      this.getCateList()
    },
    methods:{
      //获取分类列表的数据
      async getCateList(){
          try{
             const { data: res } = await uni.$http.get('/api/public/v1/categories');
             if (res.meta.status !== 200) return uni.$showMsg();
             this.cateList = res.message;
             
             //为二级分类赋值
             this.cateLevel2 = res.message[0].children
             
           }catch(error){
             uni.$showMsg('数据请求失败： ' + error);
           }
      
      },
      activeChanged(i){
        this.active = i
        
        //重新为二级分类赋值
        this.cateLevel2 = this.cateList[i].children
        
        // this.scrollTop = 0
        
        this.scrollTop = this.scrollTop === 0 ? 1 : 0
        
      },
      //跳转到商品列表页面
      gotoGoodsList(item){
        uni.navigateTo({
          url: "/subpkg/goods_list/goods_list?cid=" + item.cat_id
        })
      },
      gotoSearch(){
        // console.log('ok')
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    
    
    }
	}
</script>

<style lang="scss">
  .scroll-view-container{
    display: flex;
    
    .left-scroll-view{
      width: 120px;
      
      .left-scroll-view-item{
        background-color: #F7F7F7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;
        
        &.active{
          background-color: #FFFFFF;
          position: relative;
          
          &::before{
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #C00000;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);

          }
   
        }
      }

    } 
  }
  
  .cate-lv2-title{
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 15px 0;
  }

  .cate-lv3-list{
    display: flex;
    flex-wrap: wrap;
    .cate-lv3-item{
      width: 33.33%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      margin-bottom: 10px;
      image{
        
        width: 60px;
        height: 60px;
      }
      
      text{
        font-size: 12px;
      }
    }
    
  }








</style>
